The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 22, 2008
Filed:
Nov. 25, 2006
Yutaka Okamoto, Chofu, JP;
Hideo Ando, Hino, JP;
Chosaku Noda, Kawasaki, JP;
Yutaka Kashihara, Fuchu, JP;
Yutaka Okamoto, Chofu, JP;
Hideo Ando, Hino, JP;
Chosaku Noda, Kawasaki, JP;
Yutaka Kashihara, Fuchu, JP;
Kabushiki Kaisha Toshiba, Kawasaki-shi, JP;
Abstract
A signal can be detected based on a level slice system and detection delay time can be reduced by setting the recording density of a header field in a linear direction lower (coarse) than that of a user data recording field. Further, a signal can be detected based on the level slice system and detection delay time can be reduced by using a mark position form having a large detection margin as an information recording system of the header field. A readout error of a sector number due to a detection error is compensated for by recording address marks AM for attaining byte synchronization of the header field in both of a head portion and tail portion of information recorded in the header field.